Kids can be pretty mean — and that goes for their treatment of robots just as much as it does siblings and classmates. But an unusual new robotics project may be able to help. “Shelly” is a robotic tortoise developed by engineers from South Korea’s Naver Labs and Seoul National University. The difference between Shelly and other kinds of bots some of you may have had in the classroom is that this one shows emotional feedback based on how it’s treated.